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Appendix B Internal I/O Registers
LCR—LCD Control Register
Bit
7
Initial value
1
Read/Write
Rev. 6.00 Aug 04, 2006 page 600 of 680
REJ09B0145-0600
6
5
PSW
ACT
DISP
0
0
R/W
R/W
R/W
Display data control
0 Blank data is displayed
1 LCD RAM data is displayed
Display function activate
LCD controller/driver operation halted
0
LCD controller/driver operates
1
LCD drive power supply on/off control
0 LCD drive power supply off
1 LCD drive power supply on
H'C1
4
3
2
CKS3
CKS2
0
0
0
R/W
R/W
Frame frequency select
Bit 3
Bit 2
CKS3
CKS2
0
*
0
*
0
*
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
LCD controller/driver
1
0
CKS1
CKS0
0
0
R/W
R/W
Bit 1
Bit 1
Operating Clock
CKS1
CKS0
φw
0
0
φw/2
0
1
φw/4
1
*
φ/2
0
0
φ/4
0
1
φ/8
1
0
φ/16
1
1
φ/32
0
0
φ/64
0
1
φ/128
1
0
φ/256
1
1
Don't care
*
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